Marvin must track down a missing teenage girl after her romantic interest is discovered decapitated.

After being forced to take a desk role in the office, Flute decides to lead a double-life and become a dog-themed superhero named McSnuff.

The Grimsburg police department goes undercover at a wedding to catch the notorious bouquet-catcher killer. Kang, Summers, and Wynona try to perform convincingly as the wedding band but Flute is distracted when Harmony catches the bride's bouquet, putting her in the killer’s crosshairs.

In a failed attempt to catch "The Cartwheel Killer," Marvin is eager for a new partner who won't slow him down. Someone sleek and tough, with the mustache befitting its own 80s TV show, Marvin looks for a partner just like him, if not better.

In an attempt to stop Marvin from forgetting about him, Stan and Dr. Pentos create a diabolical plan staging his disappearance.

Marvin and the team investigate the death of a morning TV host, in which former child star Lil' Betsy is the main suspect. In the process of the investigation, Marvin becomes consumed with his newfound celebrity status. With everyone rallying around Lil' Betsy, Marvin is determined to find her guilty.

During the town's talent show, a serial killer targets the winner as Marvin finds himself at the judging table to capture them in the act.

In an attempt to become immortal, Marvin drinks a special potion that causes rapid de-aging. Meanwhile, the department hires a new lieutenant.

On a day where murder seems to be on the low, the biggest of Marvin's problems is his missing danish. The quest for the sweet boysenberry danish leads to an explosive case no one saw coming.